Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 42: Quanteninformation II
Q 42.1: Vortrag
Dienstag, 8. März 2005, 14:00–14:15, HU Audimax
Demonstration of the Deutsch-Jozsa Algorithm with Single Photons — •Sven Ramelow, Thomas Aichele, Matthias Scholz, and Oliver Benson — Humboldt-Universität zu Berlin, AG Nanooptik, Hausvoigteiplatz 5-7, 10117 Berlin
Among the numerous concepts of implementing qubits for quantum computation, single photons have become a particularly useful working horse for studying entanglement, quantum information and quantum computation. As one of the first quantum algorithms illustrating the vast potential of quantum computation, the Deutsch-Jozsa Algorithm has already been realized in NMR1 or ion-trap quantum computing2.
The Deutsch-Jozsa Algorithm evaluates if a function is constant or balanced. In the case of a 2-bit function, the algorithm can be demonstrated using single photons and linear optics3. In our experiment, the first qubit is implemented by two spatial modes of the photon and the second qubit by the polarization of the photon. Single photons are produced by a source using InP quantum dots4. Further experimental demonstrations of fundamental quantum effects will be discussed.
1 N. Linden, H. Barjat, R. Freeman, Chem. Phys. Lett. 296, 61,(1998)
2 S. Gulde, M. Riebe, G. Lancaster, C. Becher, J. Eschner, H. Häffner, F. Schmidt-Kaler, I. Chuang, R. Blatt, Nature 421, 48, (2003)
3 S. Tekeuchi, Phys. Rev. A 62, 032301 (2000)
4 V.Zwiller, T. Aichele, W. Seifert, J. Persson, O. Benson, APL 82, 1509, (2003)